Extend Display: Available when mirroring is disabled, you can change the primary screen (the one treated like the main display in terms of menus and other system elements) by selecting it.Main Display: Make this the primary display, always chosen the first time you enabling AirPlay streaming to a target to the internal or primary display of the Mac.These options are a little different from previous versions of macOS, too. In either case, you can click a display name and choose an option to change extending or mirroring. They either appear side-by-side for an extended desktop or overlapping for a mirrored one, as shown in the figures below. Now in the Displays preference pane (if you’re not already there), there’s a new visualization, which shows an proportionately sized outline of the displays part of or connected to your device and that of the AirPlay destination. Alternatively, select the destination from the Add Display menu in the Displays preference pane.) In the Control Center, click Screen Mirroring and select your AirPlay destination.

How can i see screen mirroring on mac